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Section Patrol Craft Photo Archive

ex-Herreshoff No. 306 (SP 1841)

Call sign (1918):
Nan - Unit - Fox - Tare

Black Watch call sign (1927):
Mike - Fox - Negative - King

Herreshoff #306 served both the U.S. Navy and U.S. Army Air Service

Patrol Yacht:

  • Built in 1917 as Hull No. 306 by the Herreshoff Manufacturing Company, Bristol, RI
  • Acquired by the Navy 4 February 1918
  • Commissioned USS Herreshoff No. 306 (SP 1841), 27 February 1918 at Newport, RI
  • Reclassified as District Patrol Craft YP-1841 in July 1920
  • Loaned to the War Department 2 October 1920 for use by the U.S. Army Air Service
  • Returned to the Navy in March 1921
  • Sold 1 December 1922
  • Registered in 1927 to George T. Brokaw of New York, NY as the yacht Black Watch
  • Fate unknown.


  • Displacement 60 t.
    1927 - 92 t.
  • Length 112' 5"
    1927 - 198.3'
  • Beam 15' 2"
    1927 - 15'
  • Draft 4'
    1927 - 8.1'
  • Complement: Seven (1927)
  • Speed 24 kts.
  • Armament: One 6-pounder, one Y-Gun depth charge projector and two machine guns
  • Propulsion: Two Herreshoff boilers, two 600hp vertical triple expansion steam engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Herreshoff No. 306
    Herreshoff No. 306 159k Original photos: In harbor, circa 1917-18, possibly before she was taken over by the Navy
    U.S. Navy photos NH 101787 and NH 101890
    Replacement photos: Photos from Building The Mosquito Fleet: The U.S. Navy's First Torpedo Boats, by Richard V. Simpsom
    Original photos: Naval Historical Center
    Replacement photos: Robert Hurst
    Herreshoff No. 306 162k
    USS Herreshoff No. 306 (SP 1841)
    Herreshoff No. 306 78k c. 1918
    Coco Solo, Panama
    Tommy Trampp

    View the Sector Patrol Vessel Herreshoff No. 306 (SP 1841)
    DANFS history entry located on the Haze Gray & Underway website
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    This page created by Joseph M. Radigan and maintained by David Wright
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